RE: Receiving a SCSI response after abort task was sent

Erez,
 
> I have a question about aborting tasks: when an initiator sends "abort
task" to the target,
> it is possible that the target will send a SCSI response for the same task
before receiving the
> abort task (I guess that the target won't send a task management response
for the abort task).
 
Yes and (No) in that order.  The "abort task" task management function
is defined to succeed when the task does not exist - the response will
indicate success in this situation.
 
> What should the initiator do with the SCSI response?
 
Process it normally, as it would any other SCSI Response.
 
> Is the host that issued the abort task willing to receive a SCSI response
for that task?
> Is it willing to receive only a task management response for the abort
task?
 
Yes and No in that order, the SCSI response is possible and must be
handled.  There will always be a task management response, independent
of whether the SCSI response is issued.  One important rule is that
the SCSI response cannot occur *after* the task management response.
 
Thanks,
--David
---------------------------------------------------- 
David L. Black, Senior Technologist 
EMC Corporation, 176 South St., Hopkinton, MA  01748 
+1 (508) 293-7953             FAX: +1 (508) 293-7786 
[email protected]        Mobile: +1 (978) 394-7754 
---------------------------------------------------- 


  _____  

From: Erez Zilber [mailto:[email protected]] 
Sent: Sunday, July 02, 2006 6:48 AM
To: [email protected]
Subject: [Ips] Receiving a SCSI response after abort task was sent


Hi,

I have a question about aborting tasks: when an initiator sends "abort task"
to the target, it is possible that the target will send a SCSI response for
the same task before receiving the abort task (I guess that the target won't
send a task management response for the abort task). What should the
initiator do with the SCSI response? Is the host that issued the abort task
willing to receive a SCSI response for that task? Is it willing to receive
only a task management response for the abort task?

This message was also sent to linux-scsi mailing list.

Thanks

-- 


____________________________________________________________

Erez Zilber   |  972-9-971-7689

Software Engineer, Storage Team

Voltaire - The Grid Backbone



 www.voltaire.com <http://www.voltaire.com/>

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